Does anybody know the correct dimensions of the Engine Oil Cooler O-Ring which fits the 4.2? I believe the official Jaguar part number is JLM21003. I think it may be a close equivalent to the BS231 dimensions: 2 5/8 inches x 1/8 inch, but I am very happy to be corrected. To be honest I am simply being a bit of a Scrooge - if these dimensions are correct I object to paying $61 Australian for an OEM O-ring when I can buy a BS231 N90 for about three bucks.

 

I think I found a Fel-Pro part number?
Try Fel-Pro 72796. They are still expensive here in the US at about $10 and maybe they can ship it to you but I bet you can find the Fel-Pro part locally?

O-Ring
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